statistics question

Question

a certain country the mean number of children in a household in the urban area is 3 with a standard deviation of 2. in the rural area the mean is 5 with a standard deviation of 1. a. which area tends to have a larger number of children in the household. b. which area has a larger variability in the number of children in the household

Answer 1

This is really straight forward:

Mean (urban) = 3

Mean (rural) = 5

 

this means that rural has a larger number of children in households.

 

SD (urban)  = 2

SD (rural) = 1

 

The urban area has a lager variability.

 

SD  is a measure of variability.